StarLust is a space-based RTS that features ships you build yourself! Build and customize your own fleet and fight in randomly generated solar systems.
We've recently started on an alert system. It's really basic at the moment but we'll be adding and improving on it as we keep moving along. Before it was extremely hard to tell when you were under attack, especially when zoomed far out.
Now, when zoomed out at least you'll be notified anytime one of your planets or starbases takes damage. There is no audio to the notification yet (but there is no audio in most of the game yet). A giant orange warning triangle pops up where you're being attacked. Seems simple but its super helpful!